Hello. First off I would like to mention that I am new to this forum. But I encountered a virus called "System Check" yesterday, and saw on this forum that you might be of help. I should mention that I have tried a few other solutions to the problem, running for example Microsoft Security Essentials, which didn't find anything. I also ran the Malwarebytes Anti Malware, which found I think three threats, and now at least system check does not keep popping up. Although, I still have the problem that all files are hidden, etc, so I think that it is still lurking in the background. I hope my attempts of removing it hasn't ruined my chances of getting rid of it. I hope you can help me. Thank you in advance.